The 40C was one of the first anemometers designed exclusively for the wind industry.
The 40C Anemometer has recorded wind speeds of 96 m/s (214 mph). Their bearings and low moment of inertia permit very rapid response to gusts and lulls. Due to their output linearity, these sensors are ideal for use with various data retrieval systems. A four-pole magnet induces a sine wave voltage into a coil, producing an output signal with frequency proportional to wind speed.
Constructed of rugged Lexan cups, the 40C is molded in one piece for repeatable performance. A rubber terminal boot is included with each anemometer for additional protection from the elements.
A MEASNET calibration certificate is available for each sensor: Download Calibration Report.
Specifications Print Specs
|NRG 40C Anemometer | MEASNET Calibrated (#1900)||NRG 40C Anemometer | CPH MEASNET Calibrated (#4350)|
|Sensor type||3 Cup Anemometer||3 Cup Anemometer|
|Sensor range||1 m/s to 96 m/s (2.2 mph to 215 mph) (highest recorded)||1 m/s to 96 m/s (2.2 mph to 215 mph) (highest recorded)|
|Instrument compatibility||All NRG loggers||All NRG loggers|
|Signal type||Low level AC sine wave, frequency linearly proportional to wind speed||Low level AC sine wave, frequency linearly proportional to wind speed|
|Anemometer Transfer Function||
||See individual calibration report|
|Output voltage at threshold||80 mV (peak-to-peak) minimum||80 mV (peak to peak) minimum|
|Output voltage at 60Hz||
|Calibration||Each anemometer individually calibrated, calibration reports provided via electronic download||Each anemometer individually calibrated, calibration reports provided via electronic download|
|Output signal range||0 Hz to 125 Hz (at 96m/s, highest recorded)||0 Hz to 125 Hz (at 96m/s, highest recorded)|
Accuwind (Riso-R-1556) Classification:
Accuwind (Riso-R-1556) Classification:
|Distance constant (63% recovery)||
|Moment of inertia||
|Swept diameter of rotor||190 mm (7.5 inches)||190 mm (7.5 inches)|
|Mounting||Onto a 13 mm (0.5") diameter mast with cotter pin and set screw||Onto a 13 mm (0.5") diameter mast with cotter pin and set screw|
|Tools required||0.25 inch nut driver, petroleum jelly, electrical tape||0.25 inch nut driver, petroleum jelly, electrical tape|
|Operating temperature range||-55 °C to 60 °C (-67 °F to 140 °F)||-55 °C to 60 °C (-67 °F to 140 °F)|
|Operating humidity range||0 to 100% RH||0 to 100% RH|
|Connections||4-40 brass hex nut/post terminals||4-40 brass hex nut/post terminals|
|Weight||0.14 kg (0.3 lbs)||0.14 kg (0.3 lbs)|
|Cups||One piece injection-molded black polycarbonate||One piece injection-molded black polycarbonate|
|Body||Housing is black ABS plastic||Housing is black ABS plastic|
|Shaft||Beryllium copper, fully hardened||Beryllium copper, fully hardened|
|Bearing||Modified Teflon, self-lubricating||Modified Teflon, self-lubricating|
|Magnet||Indox 1, 25 mm (1 inch) diameter, 13 mm (0.5 inch) long, 4 poles||Indox 1, 25 mm (1 inch) diameter, 13 mm (0.5 inch) long, 4 poles|
|Coil||Single coil, bobbin wound, 4100 turns of #40 wire, shielded for ESD protection||Single coil, bobbin wound, 4100 turns of #40 wire, shielded for ESD protection|
|Boot||Protective PVC sensor terminal boot included||Protective PVC sensor terminal boot included|
Mon – Fri: 8:30am – 5:00pm Eastern Time (GMT-5)
Extend and retrofit NRG booms to meet your project’s needs with our boom extensions and adapter kits.
Interface 40C to Logic Level, Speed Amp #892E
Convert the 40C Anemometer from AC sine wave to square wave.
Interface #40 to Voltage, #SI5100
Interface the 40C Anemometer with an analog device such as a computer, meter, or recorder.
Sensor Calibration Service
Use these services to recalibrate anemometers available from NRG.
Sensor Cable Kit - 2C
Use this two-conductor (2C) cable for unheated anemometers.
Sensor Terminal Boot
Protect your sensor terminal from exposure to the elements with a terminal boot.
Symphonie® SCM Card
Condition your sensor’s output signal so that a SymphoniePLUS3 Data Logger can read it by installing a Symphonie Signal Conditioning Module (SCM).